commitmonitor Code

* use a better, reentrant reader/write section class
* refresh the UI in a timer interval

After deleting items, automatically select the previous item.

Block the custom draw handler of the list control while the control data is updated/changed.

Start the internal diff viewer if it isn't configured otherwise in the registry.

Reorganize the main dialog.

This is a bigger change:
* only use one instance of CUrlInfos
* pass around that one instance to wherever it's needed
* guard the data in CUrlInfos with critical sections
* make sure the data is guarded only for short times
* in the monitoring thread, use a copy of the CUrlInfos data because of the point above

Implement resizing the log message view.

Remove the variable m_bThreadRunning from the main dialog: the main dialog doesn't have a thread.

Put all urls which are part of an SVNParentPath below the tree node of the SVNParentPath entry.

Update the tree view text and state after a log message changes its state from 'unread' to 'read'.